So when my bots are use the hearthstone when they get stuck or when they need to repair they can´t move out of dalaran on there own ..... This problem isn´t even new... i deal with this problem for like 2-3 month .. First of all when the bot ports back to dalaran, because he stuck somewhere, than he just don´t move from the the moment he is in dalaran. He just stays there for hours and can´t make up a path... Failed ground nav from <-834.6122, 4369.833, 738.6298> to <2031.182, 4870.862, 141.0931> with status PathGenerationFailed. That comes with EVERY hotspot you give him so <2031.182, 4870.862, 141.0931> isn´t the problem. Than you have the case that he ports back because he need to repair himself... i have chosen <Vendor Entry="29476" Name="Dagna Flintriegel" Z="739.1738" Y="4378.946" X="-868.9121" Nav="Fly" Type="Repair"/> so he use the dalaran stone runs to Dagna Flintriegel DON´T repair and get stuck there ... why he dosen´t repair NO IDEA... he just don´t talk with her and thats it ... so he get´s stuck with the repair one too....
KnownFlightNodes.json file in the settings causes the issue i believe, got the same issues since ages as many others do but seems to not get fixed, only keeps getting "pushed" to the devs. There is a workaround for it though.